The A213 T5 Embedded Fin Tube is a high-performance heat transfer
component designed for demanding industrial applications. Below is
a detailed, technical description of its specifications, design,
and use cases:
1. Base Tube Material: ASTM A213 T5
Alloy Composition: Chromium-molybdenum (5Cr-0.5Mo) steel, compliant
with ASTM A213 T5 standards.
Key Properties:
High-Temperature Strength: Retains mechanical integrity at
temperatures up to 600°C (1,112°F).
Corrosion/Oxidation Resistance: Chromium content provides
resistance to scaling and oxidation in steam/high-heat
environments.
Seamless Construction: Manufactured without welds, ensuring
reliability under high-pressure conditions (common in boilers and
superheaters).
2. Embedded Fin Design
Construction Process:
Grooving: Precision-machined helical or longitudinal grooves are
cut into the outer surface of the base tube.
Fin Insertion: Metal fins (typically carbon steel, stainless steel,
or alloy steel) are mechanically pressed or rolled into the
grooves.
Bonding: The fins are cold-worked into the grooves, creating a
tight mechanical bond without welding.
Geometry: Helical (spiral) or longitudinal (straight) fins;
serrated fins for enhanced turbulence.
3. Key Features
Thermal Efficiency: Increased surface area (up to 10–15x bare tube)
improves heat transfer rates in gas-to-liquid or liquid-to-liquid
systems.
Ideal for applications with low-convection media (e.g., exhaust
gases).
Mechanical Durability: Embedded fins resist loosening from thermal
cycling or vibration.
No weld fatigue, making them suitable for high-temperature,
high-stress environments.
Customization: Fins can be tailored in height, thickness, spacing,
and material to optimize performance for specific loads (e.g.,
ash-laden flue gas, corrosive fluids).
4. Applications
Power Generation: Boilers, superheaters, economizers, and air
preheaters.
Petrochemical: Heat recovery steam generators (HRSGs), reformers.
Industrial HVAC: Waste heat recovery from furnaces or kilns.
Marine/Offshore: Compact heat exchangers for engine cooling or fuel
heating.
6. Advantages Over Welded/Extruded Fins
No Thermal Degradation: Cold-working preserves the base tube’s
metallurgical properties.
Lower Fouling Risk: Smooth groove-to-fin interface minimizes
ash/debris buildup.
Cost-Effective: Longer service life in harsh conditions reduces
maintenance costs.
7. Standards & Certifications
Complies with ASME Section I (power boilers) and Section VIII
(pressure vessels).
Testing: Hydrostatic testing, non-destructive testing (NDT), and
fin bond strength verification per manufacturer protocols.
